Guard for springs.



S. P. WILBUR.

GUARD FOR SPRINGS.

APPLIOATION FILED DEC. 23, 1909.

Patented Dec. 9, 1913.

. NVENTOR.

A TTORNEY IN FACT.

- COLUMBIA Funds-RAP UNITED STATES PATENT orrion.

SAMUEL 1?. WILBUR, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 NERNST LAMP COMPANY, A CORPORATION OF PENNSYLVANIA.

GUARD FOR SPRINGS.

To all whom it may concern Be it known that I, SAMUEL P. WILBUR, a citizen of the United States, and a resi: dent of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have made a new and useful Invention in Guards for Springs, of which the following is a specification.

This invention relates to electric lamps but more particularly to means for supporting or mounting the light emitting elements thereof.

It is well known that in certain kinds of electric lamps and especially in second class conductor lamps, the light emitting elements (in second class conductor lamps generally called glowers) become more or less plastic when hot and unless they are under some tension they are liable to sag, but this tension must not be enough to unduly stretch them.

It is the object of my invention to pro vide means for mounting the light emitting elements, hereinafter called the glowers, under tension and to provide means for limiting the movement of the tension device or devices as well as to protect the tension devices in handling due to assembling or in the course of repair of the lamp.

In the drawings Figure 1 is an elevational view of a amp base showing the glowers, terminals, tension device and the guard therefor constructed in accordance with my invention. Fig. 2 is a perspective view of the base, terminals, and the guard, and Fig. 3 is a perspective view of the guard.

Referring now to the drawings by numerals of reference, 5 designates a suitable base of non-conducting material, as for example porcelain, at one end of which are shown a plurality of metallic supports 6 having bifurcated extremities 7. To the opposite end of the base block are a pinrality of spring supporting members 8 which are secured thereto in any suitable manner. Each support 9 is shown as being approximately U-shaped with one end secured to the block and the other end projecting above the same and terminating in a hook or bifurcated portion 9 in line with the bifurcated portion 7 of a complementary support 6. 1O designates a glower or other light emitting element, said glower being provided with terminal wires 11 and 12 to respectively engage the bifurcated portions 7 and 9 of Specification of Letters Patent.

Application filed December 23, 1909.

Patented Dec. 9, 1913.

Serial No. 534,685.

the supports, the ends of the wires 11 and 12 being preferably provided with heads 1.3 and 1 1 so that when the wires are dropped between the bifurcated hooks the glowers will be held against accidental displacement. 15 and 16 are terminals connected to said block 5. As will be well understood, the free end of the support or supports 8 have a tendency to move away from the block 5 and are liable to become disruptured or broken or otherwise disarranged under certain conditions.

Some difficulty is experienced in handling the base with the unprotected supports 8 so I have provided means for housing the supports 8 for spacing them apart and for limiting the movements thereof in one direction. The means whereby the above is accomplished is best shown in Fig. 3 in which I have shown a strip 17 of suitable metal and of approximately U shape, one leg of which is provided with an outwardly projecting flange or lip 18 having a perforation or opening 19 therein alining with the perforation 20 in the lip 21 struck from said guard. The other leg of the guard 17 projects beyond the first one and it is provided with approximately parallel flanges 22 and 23 which have their longitudinal edges slightly bent outward as shown in 2 1 and 25 to engage an approximately dovetailed groove 26 in the bloek5 whereby one end of the guard will be secured to the block, the other end being secured preferably by one of the terminals 15 which may project through the openings 19 and 20 and add rigidity to the attached guard. The widths of the flanges 22 and 23 will be such as to limit the outward movements of the free ends of the supports 8 and these supports may be spaced apart by spacing members which comprise inwardly projecting pins 26 and 27 struck from the metal of which the guard 17 is made. The guard will be made of sulficiently stiff metal to thoroughly protect the supports and any liability of their becoming disarranged in ordinary handling or under other conditions will be avoided.

What I claim is:

1. The combination with a light emitting member of an electric lamp, a spring i11- cluded in the member circuit, and serving as a support therefor and a guard or housing for said spring.

2. In a device of the class described, the

10 longer leg for engaging a lamp base, and

spacing means for the glower supports on one of said legs.

In testimony whereof, I have hereunto subscribed my name this 20th day of Dec.,

SAMUEL P. WILBUR.

Witnesses:

GEO. J. TAYLOR, A. L. EUSTICE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

